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I G. A. MGILHENNY 8v T. G. LANSDEN.

HYDRAULIC MAIN PQR GAS WORKS. No. 380,911.`

IVIIIII 33513.' u Miou/1 1g.

N. PUERS. PhumLimey-.lphpn wnsmngmn, 0,0.

UNITED STATES GEORGE A.'MOILHNNY AND THOMAS G. LANSDEN,

DTSTRIOT OF OOLUHBIA.

or WASHINGTON,

HYDRAULIC lVIAlN FOR GAS-WORKS.

SPECIFICATION forming part of Letters Patent No. l380,911, dated April l0, 1888..

Application filed April 11, 1887. Serial No. 234,401. -(No model.)

' city of l/Vashington, in thc District of Columbia, have invented certain new and useful Improvements in Hydraulic Mains for Gas- W'orks; and we do hereby declare that the following specification, taken in connection with the drawings furnished and forming a part of the same, is a clear, true, and complete description of our invention.

Our said improvements relate to the dippipes within the hydraulic mains,andto means for providing a direct communication between the interior of a dip-pipe and the interior of -the main above the usual water-seal. Various means have heretofore been devised for this purpose; and the prime object of our present invention is to provide'an economical, simple, eective, and easily-operated valve mechanism which will enable a prompt and perfect closure at the valve-seat without that liability of derangement heretofore known toexist because ofthe inevitableprescnce of obstructive matter.

Various forms of sliding gates have heretofore been employed-as, for instance, as disclosed in the Letters Patent No.247,386, issued to George A. Mcllhenny September 20,1881, and we have also used a tapered plug-valve,as disclosed in said Mcllhennys Letters Patent No. 282,345, July 31, 1883; but, while each of said prior improvements possessed practical value as compared with means used prior thereto, there were certain objections encountered in their practical operation, which we have now soughttoovcrcome. Inthense of the sliding gate or valve the irregular accumulations of solid matter on the coincident surfaces at times rendered the closure more or less unreliable, and while the aforesaid tapered plugvalve as heretofore used effectually obviated that difficulty, it was so organized as to essentially require a horizontal valve-stem projecting through the side of the hydraulic main and essentially involved the use of packing-glands and a consequent lack of freedom in the movement of the valve.

The advantages incident to a vertically-operated valve-stem have heretofore been partially attained by providing valve-chambers outside of and above the hydraulic main,either as a part of a specially-formed length of a vertical outside section of dip-pipe or as a separate structure,conpled by a lateral pipe to the having a circular hole in its top to serve as a.

valve seat, and we employ therewith a conical Valve provided with aV vertical stem housed within .a vertical pipe-seal of a weltknown form on top of the main, thus securing a reliable gastight joint, perfect freedom of movement by the valve and itsstem, and, if desired, a capacity to close by its own gravity and yet secure a gas-tight joint at its seat,1'egardless of ordinary obstructive matter thereon, all at very low cost and with a minimum expense for repairs and adjustment; and one very important feature is, that our improvements can be readily and cheaply applied to dip-pipes and mains already in use.

.After fully describing our invention in connection with the drawings, the features deemed novel will be specified yin the several clauses of claim hereunto annexed.

Figurel is a view ofthe outer end ofv a retort, .an ascension-pipe coupled at its top to a dip-pipe, and a hydraulic main in cross-section having our improvements applied thereto. FigA 2 is an enlarged sectional view of a portion of said main, the lower end of the dippipe, its valve-chamber, and the valve in accordance with our invention. Fig. 3 is a lateral section of said dip-pipe and the valvechamber on line fr, Fig. 2. Fig. 4 in lateral section illustrates the hydraulic main, an ascension-pipe terminating within a pendent dip-pipe, and provided with our present imn provements.

In Fig. l the retort A, ascension-pipe B, dippipe O, and hydraulic main D are clearly indicated,the eduction end a of the dip-pipe being water-sealed in the usual manner.

At one side of the dip-pipe, at its end a, is the valve chamber E, which is essentially heated within the hydraulic main and is in open 'communication with the interior of the dip IOO ` pipe. This valve-chamber may have a bottom;

but it is preferably without one, as shown, its vertical Walls dipping into the Water in the main, like theend of the dip-pipe. The 1ocation of this valve-chamber and valve within the hydraulic main enables ordinary dip pipe elbows to be used above the main with attendant economy in space as well as in cost of construction, andit also obviates many pipe-joints with incident leakage, more or less liable to the use of valve-chambers located outside of said main.

The top b of the valve-chamber is horizontal and provided with a circular hole, b', theedges of which serve as a valveseat, and said edges should be sharp enough to enable them to cut through obstructive matterinterposed between the seat and the valve-plug F when the latter is dropped for closure. The valve or valveplug F is tapered, andwith its stem c should be heavy enough to ordinarily effect a closure by its own weight.

In thetop of the main, centrally over the valve-seat b', a tapped hole receives the vertical pipe d, within which the valvestem c is guided, although loosely ltted, so as to secure absolute-freedom of vertical movement. ySurrounding said pipe d is the large pipe e, closed at its bottom and open at its top, for the reception of water within the annular space around the pipe d. The valve-stem c has pendent from its upper end the pipef, which is closed at its top, open at its bottom, surrounds the pipe d, and occupies said annular space, which, when tilled with water, affords a Waterseal in a manner Well known and as variously used in other connections.

The top of the valve-stem is coupled to a lever, g, provided with a pendent hand-rod, g', accessible at the front of the retort-bench.

It will be readily seen that the dippipe may have the valvechamber E formed integrally therewith, as when newly constructed; or they may be separately made and bolted together, as when the chamber is to be applied to dippipes already in use, the latter only requiring a series of lateral holes for gas-ducts, or an Y. opening cut away therein in lieu thereof, and

.that in either event the Vcost will be trilling.

It will also be seen that a single tapped hole in the top of the main is required for mounting the Valve in position, and that the mere drop' ping of the valve will insuregood closure. If at any time the valve-seat or the plug should become unduly1 clogged with solid matter, rendering a clearing effect desirable, it will be only necessary to detach the valvestem from its lever, and by the rotation of the stein and the churning of the valve on its seat to secure a perfect closure. A

In Fig. 4 another arrangement is shown, in which the ascension-pipe B terminates in a detachable pendent dip-pipe, C', which is pro.- Vided with a lateral valve-chamber, E. The aperture in the top of the main D conforms to the lateral outline of the dip-pipe and chamber, and the ange h, which supports them, has a corresponding form, and the valvestem seal is mounted in said ange, thns providing a diplpipe and valve all complete and ready for attachment to a main of this type, and requiring only that the top of the main should be cut away at one point to admit of the introduction of a dip-pipe having the lateral valve-chamber.

While the best results will accrue from the use of the valve-chamber, the conical valve,and the vertical valve stem freely carried within the Watersealed pipe, as shown, the economic and effective advantages of the dip pipe provided with the lateral valve-chamber, the conical valve, and the vertical Valvespindle will accrue even if the latter be provided with other Wellknown forms of packing and sealing contrivances.

Having thus described our invention, We claim as new and desire to secure by Letters Patentl. The combinatiomwith a hydraulic main, of a dip-pipe provided with a lateral valvechamber located within said main, a valve-seat in the top of said chamber, and a conical valve provided with a vertical stem projecting through the top of the main, substantially as described.

2. The combination, with a hydraulic main, of a dip-pipe provided With'a lateral valvechamber located within said main, a valve-seat in the top of said chamber, a conical valve provided with a vertical stem, and a Watersealed pipe serving as a guide for said stem, substantially as described.

GEORGE A. MCILHENNY. THOMAS G. LANSDEN.

Witnesses:

W. H. G. BAYLY, PHILIP F. LARNER.

IOO 

